Qt Reference Pages

All Classes: If you know the name of the class you want, find it here.

All Classes by Module: A list of all C++ API components in Qt 5

All Modules: A list of all modules in Qt 5.

All Namespaces: A Qt namespace contains enum types, functions, and sometimes classes.

All QML Basic Types: A list of QML basic types in this Qt release.

All QML Modules: A list of all QML modules in Qt 5.

All QML Types: A list of QML types in this Qt release.

Annotated Class List: If you don't know the name of the class you want, but you know what the class should do, you might try looking here.

Groups Of Related Classes: If you know what kind of class you want (GUI, painting, I.O, etc), look here.

Inheritance Hierarchy: The C++ class inheritance hierarchy for all classes in the Qt API.

Obsolete Classes: Classes and members marked obsolete that should not be used in new code.

Obsolete QML Types: A list of obsolete QML types that should not be used in new code.

<QFloat16>: The <QFloat16> header file provides 16-bit floating point support.

<QtAlgorithms>: The <QtAlgorithms> header includes the generic, template-based algorithms.

<QtEndian>: The <QtEndian> header provides functions to convert between little and big endian representations of numbers.

<QtGlobal>: The <QtGlobal> header file includes the fundamental global declarations. It is included by most other Qt header files.

<QtMath>: The <QtMath> header file provides various math functions.

All Functions: All documented Qt functions listed alphabetically with a link to where each one is declared.

The QML Reference

Qt Creator

Qt Linguist

Qt Assistant

Qt Designer

qmake

Using Qt with CMake

qdoc

Qt for Device Creation

Qt for Android: Provides information about Android support in Qt.

Qt for Embedded Linux: Provides information about Embedded Linux support in Qt.

Qt for INTEGRITY: Platform support for INTEGRITY.

Qt for Linux/X11: Platform support for Linux/X11.

Qt for VxWorks:

Qt for WinRT: Provides insight into Qt's WinRT port and how to use it.

Qt for Windows: Platform support for Windows.

Qt for iOS: Provides insight into Qt's iOS port and how to use it.

Qt for macOS: Platform support for macOS. macOS (previously known as OS X or Mac OS X) is a UNIX platform and behaves similarly to other Unix-like platforms. The main difference is that X11 is not used as the windowing system. Instead, macOS uses its own native windowing system that is accessible through the Cocoa API. Application development on macOS is done using Xcode, which is available from https://developer.apple.com/xcode/.